"""
	File introduction
"""
import main
from nose.tools import eq_

def test_case1():
    """example 1: test case"""
    eq_(main.raphael(123), 123)
def test_case2():
    """example 1: test case"""
    eq_(main.add(123, 123), 246)
def test_case3():
    """example 1: test case"""
    eq_(main.fun2(246), 246)
def case4_test():
    """example 1: test case"""
    eq_(main.fun2(246), 246)
